Equipment for aging test of road traffic signal controller
By designing a combination of signal light group, load branch and temperature control switch branch, and combining it with heat dissipation devices, the problem that existing signal test equipment cannot truly simulate load conditions has been solved, thus improving stability and safety.
Patent Information
- Application Number
- CN202520317052.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2035-02-26
AI Technical Summary
Existing technologies cannot accurately simulate the load conditions of signal controllers in actual application scenarios, resulting in discrepancies between test results and actual operating conditions. Furthermore, prolonged operation under load may lead to equipment damage or safety accidents.
Design an aging test device for road traffic signal controllers. Simulate real working conditions through signal light groups, load branches, and temperature control switch branches. Combine with heat dissipation devices for temperature monitoring and protection to ensure the stability and safety of the equipment.
The system simulated the actual load aging operation of the signal, ensuring stable output of the signal and timely cutting off the circuit under high temperature conditions to avoid equipment damage and ensure test safety.
Smart Images
Figure CN223692670U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of road traffic signal control, in particular to a device for road traffic signal controller aging test. BACKGROUND
[0002] With the acceleration of urbanization, the importance of road traffic management is increasingly prominent. As one of the core devices of modern traffic management system, road traffic signal controller (referred to as signal controller) plays a crucial role in ensuring road traffic efficiency and traffic safety. The main function of the signal controller is to provide stable and sufficient power output for road traffic signal lights according to the preset control logic or algorithm, so as to drive the lighting or extinguishing of the signal lights. Therefore, the reliability of the signal controller and the stability of the output are directly related to the normal operation of the entire traffic system.
[0003] At present, in the production process of the signal controller, in order to ensure that its performance meets the needs of actual application, it is usually necessary to carry out load aging test on the whole machine to ensure the reliability of the signal controller. However, the traditional test method cannot accurately simulate the load conditions in the actual application scene, resulting in a certain deviation between the test results and the real running situation, in addition, in the process of long time load running, the load module will generate a large amount of heat, which may cause damage to the equipment and even cause safety accidents. CONTENT OF THE INVENTION
[0004] In view of the above problems of the prior art, the present application provides a device for road traffic signal controller aging test, which can simulate the working condition of road traffic signal controller load aging operation, so as to realize the load aging test of road traffic signal controller and ensure the stability of road traffic signal controller output.
[0005] To achieve the above purpose, the first aspect of the present application provides a device for road traffic signal controller aging test, comprising: a plurality of signal controller lamp groups, each signal controller lamp group comprising a red lamp branch, a yellow lamp branch and a green lamp branch; a plurality of load branches, the red lamp branch, the yellow lamp branch and the green lamp branch of each signal controller lamp group are respectively connected in parallel with the corresponding load branch; a temperature control switch branch, the temperature control switch branch is connected in series in the common trunk corresponding to the plurality of signal controller lamp groups and the plurality of load branches.
[0006] From the above, the present aspect simulates the red light, yellow light and green light of the traffic signal through the red light branch, yellow light branch and green light branch in the signal lamp set respectively, simulates the load of the signal through the load branch, and thus simulates the running condition of the signal when it is aging by controlling the size of the load to test, realizes the real simulation of the running condition of the signal control machine with load, and can make the signal provide sufficient and stable output through the test. In addition, a large amount of heat will be generated in the load test, in order to ensure the safety of the equipment, the present aspect sets a temperature control switch branch to cut off the equipment when the temperature exceeds the safety range, so as to realize the protection of the whole machine.
[0007] As an implementation manner of the present aspect, the red light branch includes a first light emitting device and a first resistor connected in series, the first light emitting device is used to emit red light when the red light branch is connected; the yellow light branch includes a second light emitting device and a second resistor connected in series, the second light emitting device is used to emit yellow light when the yellow light branch is connected; and the green light branch includes a third light emitting device and a third resistor connected in series, the third light emitting device is used to emit green light when the green light branch is connected.
[0008] As an implementation manner of the present aspect, it further includes a box body, the first light emitting device, the second light emitting device and the third light emitting device are respectively arranged on the outer surface of the box body, and the load branch and the temperature control switch branch are arranged in the interior of the box body.
[0009] From the above, by arranging each light emitting device on the outer surface of the box body, the user can easily check the running state of the whole machine, and by arranging the load branch and the temperature control switch branch in the interior of the box body, the overall structure can be more compact.
[0010] As an implementation manner of the present aspect, it further includes a plurality of wire harness connectors, the plurality of wire harness connectors are respectively arranged on the outer surface of the box body, the wire harness connector includes a live wire connector and a zero line connector; each connection end of the live wire connector is connected with the live wire connection end of the corresponding red light branch, the live wire connection end of the yellow light branch and the live wire connection end of the green light branch, and each connection end of the live wire connector is also connected with the corresponding live wire connection end of the road traffic signal control machine to be tested; the zero line connection end of the red light branch, the zero line connection end of the yellow light branch and the zero line connection end of the green light branch are all connected with one end of the temperature control switch branch; the connection end of the zero line connector is connected with the other end of the temperature control switch branch, and the connection end of the zero line connector is also connected with the zero line connection end of the road traffic signal control machine to be tested.
[0011] As an implementation form of the aspect, the plurality of passive heat dissipation devices are arranged in a stack through the first mounting member, and the plurality of passive heat dissipation devices are arranged inside the box through the second mounting member; the load branch is arranged on the surface of the passive heat dissipation device; and the temperature control switch branch is arranged on the surface of the passive heat dissipation device.
[0012] As described above, by arranging the passive heat dissipation device and arranging the load branch on the surface of the passive heat dissipation device, heat dissipation of the load device is facilitated, and safety hazards caused by heat accumulation are avoided. In addition, by arranging the temperature control switch branch on the surface of the passive heat dissipation device, problems of the load can be more accurately detected, so that the circuit is switched in time when the temperature is too high, and a thermal runaway accident is avoided.
[0013] As an implementation form of the aspect, the plurality of passive heat dissipation devices are arranged in a stack through the first mounting member, and the plurality of passive heat dissipation devices are arranged inside the box through the second mounting member; the load branch is arranged on the surface of the passive heat dissipation device; and the temperature control switch branch is arranged on the surface of the passive heat dissipation device.
[0014] As described above, by arranging the passive heat dissipation device and arranging the load branch on the surface of the passive heat dissipation device, heat dissipation of the load device is facilitated, and safety hazards caused by heat accumulation are avoided. In addition, by arranging the temperature control switch branch on the surface of the passive heat dissipation device, problems of the load can be more accurately detected, so that the circuit is switched in time when the temperature is too high, and a thermal runaway accident is avoided.
[0015] As an implementation form of the aspect, the plurality of passive heat dissipation devices are arranged in a stack through the first mounting member, and the plurality of passive heat dissipation devices are arranged inside the box through the second mounting member; the load branch is arranged on the surface of the passive heat dissipation device; and the temperature control switch branch is arranged on the surface of the passive heat dissipation device.
[0016] As an implementation form of the aspect, the load branch includes a fourth resistor, and the resistance value of the fourth resistor ranges from 1.5kΩ to 2.5kΩ.
[0017] As described above, by reasonably setting the resistance value range of the fourth resistor, the signal machine can be more truly simulated in a load aging operation condition.
[0018] As an implementation form of the aspect, the temperature control switch branch includes a temperature control resistor, the temperature control switch branch is a normally closed branch, and the temperature control resistor is used to disconnect the temperature control switch branch when the temperature exceeds a threshold value.
[0019] As an implementation form of the aspect, the active heat dissipation device includes a heat dissipation fan. BRIEF DESCRIPTION OF DRAWINGS
[0020] The various technical features of the present application and the relationship between them will be further illustrated below with reference to the accompanying drawings. The drawings are exemplary, some technical features are not shown in actual proportion, and some technical features in the drawings can be omitted, which are conventional in the technical field to which the present application belongs and are not essential to understanding and implementing the present application, or additional technical features are shown, which are not essential to understanding and implementing the present application. That is, the combination of various technical features shown in the drawings is not used to limit the present application. In addition, throughout the present application, the same reference signs refer to the same contents. The specific drawings are as follows:
[0021] Figure 1 The principle diagram of the device for road traffic signal controller aging test provided by the embodiment of the present application is shown in the figure;
[0022] Figure 2 The principle diagram of the signal machine lamp group provided by the embodiment of the present application is shown in the figure;
[0023] Figure 3 The connection diagram of the wire harness connector provided by the embodiment of the present application is shown in the figure;
[0024] Figure 4 The connection diagram of the temperature control switch branch provided by the embodiment of the present application is shown in the figure;
[0025] Figure 5a The top view of the load branch installed on the heat sink provided by the embodiment of the present application is shown in the figure;
[0026] Figure 5b The sectional view of the load branch installed on the heat sink provided by the embodiment of the present application is shown in the figure;
[0027] Figure 6 The actual figure of the device for road traffic signal controller aging test provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION
[0028] The technical solutions provided by the present application will be further described below in combination with the drawings and embodiments. It should be understood that the circuit structure and service scenarios provided in the embodiments of the present application are mainly to illustrate possible implementation manners of the technical solutions of the present application, and should not be interpreted as the only limitation of the technical solutions of the present application. Those skilled in the art can know that the technical solutions provided by the present application are also applicable to similar technical problems with the evolution of electronic circuit structure and the appearance of new service scenarios.
[0029] It should be understood that the embodiments of the present application provide a scheme for road traffic signal controller aging test device. Since the principles of these technical solutions for solving problems are the same or similar, in the introduction of the following specific embodiments, some repetitions may not be described again, but should be regarded as mutual reference between these specific embodiments, which can be combined with each other.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. If there is a conflict between the definitions in the specification and those in the patent specification, the definitions in the specification are intended to prevail. In addition, the terms used herein are for the purpose of describing embodiments of the present application only and are not intended to limit the present application.
[0031] Embodiments of the present application will be described in detail below with reference to the accompanying drawings. First, an application scenario for road traffic signal controller aging test provided by embodiments of the present application is introduced.
[0032] In urban traffic management, crossroads are very common traffic nodes, and the normal operation of traffic signal lights thereof is directly related to road traffic efficiency and traffic safety. In order to ensure that the traffic signal controller installed at the crossroads can work stably, the device for road traffic signal controller aging test provided by embodiments of the present application can be used to carry out load aging test on the traffic signal controller during production. Assuming a typical crossroads scenario, including east, west, south and north directions, four groups of signal lights are arranged in each direction, respectively, as left turn lights, straight ahead lights, non-motor vehicle lights and pedestrian lights, each group of signal lights includes red, yellow and green output channels, a total of 16 groups of signal lights (4 directions * 4 groups of signal lights), a total of 48 signal output channels (16 groups * 3 colors per group), according to the requirements of the relevant national standards (such as GB14887), the maximum rated power of each group of signal lights is 20 watts. In this application scenario, the signal machine needs to provide sufficient 220V AC power output to drive the lighting or extinguishing of the signal lights, so that whether the signal machine can maintain stable output capability in long time operation can be verified by simulating the load characteristics of the actual signal lights by the test device provided by the present application, so as to ensure that the produced traffic signal controller meets the relevant requirements.
[0033] It should be understood that the above application scenario is an exemplary description and does not limit the scope of the present application.
[0034] Embodiments of the present application provide a device for road traffic signal controller aging test (hereinafter can be referred to as test device), which will be described in detail in conjunction with the drawings. It should be noted that the "connection" between the devices and modules in the test device in the present application can be a physical connection relationship or a communication connection relationship.
[0035] As Figure 1 The schematic diagram of the device for road traffic signal controller (hereinafter can be referred to as signal machine) aging test provided by embodiments of the present application is shown in the figure, the test device includes a plurality of signal machine light groups (for example Figure 1The illustrated lamp groups 1-N, the plurality of load branches (e.g. Figure 1 The illustrated load branches 1-M, and the temperature control switch branch K.
[0036] In some embodiments, the test device further comprises a plurality of harness connectors P, which include a firewire connector and a zero wire connector. In some embodiments, the test device further comprises a heat dissipation device H and a power supply branch T.
[0037] Next, the components and the connection relationship between the components will be described in detail.
[0038] It should be noted that, since a common signal machine generally requires 16 groups of signal lights (see the description of the common application scenarios above), in order to meet this working condition, the following embodiments of the present application take an example of each test device including 18 signal machine lamp groups (satisfying the test requirement of 16 groups of signal lights, and there are 2 groups of redundancy) for description, that is, in the example of the present embodiment, the plurality of signal machine lamp groups include lamp groups 1-18. It should be understood that the number of signal machine lamp groups is only an example description, and can be adaptively increased or decreased according to actual requirements.
[0039] The signal machine lamp group is used to simulate a traffic signal light, specifically to light the indicator light of the corresponding color in the signal machine lamp group based on the control logic output by the signal machine to be tested. Each signal machine lamp group includes a red light branch, a yellow light branch, and a green light branch, wherein the red light branch includes a first light emitting device and a first resistor connected in series, the first light emitting device is used to emit red light when the red light branch is connected; the yellow light branch includes a second light emitting device and a second resistor connected in series, the second light emitting device is used to emit yellow light when the yellow light branch is connected; the green light branch includes a third light emitting device and a third resistor connected in series, the third light emitting device is used to emit green light when the green light branch is connected.
[0040] In the present embodiment, one signal machine lamp group includes one red light branch, one yellow light branch, and one green light branch. Taking lamp groups 1-18 as an example, the schematic diagram is as follows Figure 2As shown, wherein R1~R18 represent red light branch 1~red light branch 18, Y1~Y18 represent yellow light branch 1~yellow light branch 18, G1~G18 represent green light branch 1~green light branch 18; LEDx R~ represent the first light-emitting device x; LEDx Y represent the second light-emitting device x; LEDx G represent the third light-emitting device x. In this embodiment, a resistor is connected in series on each light-emitting device (including the first light-emitting device, the second light-emitting device and the third light-emitting device), and the resistance of the resistor can be any value in 150KΩ~200KΩ, and the resistance of the resistor in this embodiment is 200KΩ. Thus, 18 signal lamp groups are formed. In actual test process, for example, test is performed on lamp group 1, the green light of lamp group 1 is lighted (i.e. the voltage of green light branch is 220V), and the red light and the yellow light of lamp group 1 are in the off state (i.e. the voltage of red light branch and yellow light branch is 0V). In some embodiments, the test process of other lamp groups and other colors is similar to the above example, and will not be described in detail.
[0041] The wire harness connector is used as the input end of the test device to connect the output end of the signal machine to be tested to receive the control logic of the signal lamp. The wire harness connector includes a live wire connector and a zero line connector, and the wire harness connector is connected with the output end of the signal machine to be tested as the input end of the test device. Specifically, each connection end of the live wire connector in the wire harness connector is connected with each live wire output end of the signal machine to be tested, and the zero line connector in the wire harness connector is connected with the zero line connection end of the signal machine to be tested. Thus, the signal machine to be tested can be connected to the test device.
[0042] In addition, in the test device, each connection end of the live wire connector is connected with the live wire connection end of the corresponding red light branch, the live wire connection end of the yellow light branch and the live wire connection end of the green light branch, for example Figure 1 The 1st connection end of the live wire is connected with the red light branch in the signal lamp group 1, the 2nd connection end of the live wire is connected with the yellow light branch in the signal lamp group 1, and the 3rd connection end of the live wire is connected with the green light branch in the signal lamp group 1……the other live wire connection ends are similar, and will not be listed one by one; and the zero line connection end of the red light branch, the zero line connection end of the yellow light branch and the zero line connection end of the green light branch are connected with one end a1 of the temperature control switch branch K, and the other end a2 of the temperature control switch branch K is connected with the zero line connector.
[0043] In this embodiment, taking lamp group 1~lamp group 18 as an example, Figure 3As shown, wherein P1-P6 represent the wire harness connector 1-wire harness connector 6, R1-R18 represent the red light branch 1-red light branch 18, Y1-Y18 represent the yellow light branch 1-yellow light branch 18, G1-G18 represent the green light branch 1-green light branch 18, N represents the zero line connection end, each wire harness connector in the example includes 11 connection ends, wherein 1-10 are live connection ends, and 11 is a zero line connection end, since the embodiment includes 18 lamp groups, a total of 54 live connection ends are required (18 lamp groups*3), therefore 6 wire harness connectors are selected in the embodiment, each wire harness connector connects 3 lamp groups, for example, the 1st-9th live connection end of the P1 of the wire harness connector is connected with the red light branch R1 in the lamp group 1, the yellow light branch Y1 in the lamp group 1, the green light branch G1 in the lamp group 1, the red light branch R2 in the lamp group 2, the yellow light branch Y2 in the lamp group 2, the green light branch G2 in the lamp group 2, the red light branch R3 in the lamp group 3, the yellow light branch Y3 in the lamp group 3, the green light branch G3 in the lamp group 3, and the 10th live connection end is vacant, the connection mode of the wire harness connector P2-P5 is similar to that of the wire harness connector P1, so that all 18 signal lamp groups can be connected through 6 wire harness connectors. It should be understood that only one connection form is provided here, and more or fewer wire harness connectors with more or fewer connection ends can be selected to achieve the connection in other embodiments.
[0044] The load branch is used to simulate the rated power of the real-time signal lamp, and the purpose is to make the signal machine operate at full load according to the power required to be output in actual work. The red light branch, the yellow light branch and the green light branch of each signal lamp group are respectively connected in parallel with the corresponding load branch. In some embodiments, the load branch can include a fourth resistor, and the resistance value of the fourth resistor can be calculated as follows:
[0045]
[0046] Wherein, P1 represents the maximum rated power, since the international standard stipulates that the maximum rated power of the signal lamp is 20 watts, in order to simulate the load working condition under the aging state, the power value can be set to about 19-30 watts; U is the voltage value, generally 220V, therefore the resistance value of the fourth resistor r can be calculated based on the above formula, that is, the resistance value of the fourth resistor is 1.5kΩ-2.5kΩ, and the fourth resistor of the embodiment is preferably 2kΩ, and the corresponding power is 220*220 / 2000=24.2 watts.
[0047] In the embodiment, taking the lamp group 1-lamp group 18 as an example, each lamp group contains 3 branches (one red light branch, one yellow light branch, and one green light branch), therefore 54 load branches are required in the example to be connected in parallel to the corresponding branches of the signal lamp group.
[0048] The temperature control switch branch K is connected in series in the common line of the plurality of signal lamp groups and the plurality of load branches, and is used to be disconnected when the temperature exceeds the threshold value, so as to realize the protection of other components (such as signal lamps, loads, etc.) in the test equipment. As shown in Figure 4 The temperature control switch branch K is a normally closed branch, which can include a temperature control resistor RT1, for example, the temperature control resistor RT1 can be a thermistor, when the heat generated by the test equipment cannot be effectively dissipated, causing the temperature to exceed the threshold value, the resistance of the thermistor will rapidly increase, thereby limiting the current flow, thereby realizing the effect of disconnecting the signal lamp group and the load branch. As shown in Figure 4 The N terminal is connected to the zero line connection end of the signal lamp group, and the AC_N terminal is connected to the zero line end of the wire harness connector.
[0049] The heat dissipation device H is used to provide heat dissipation function for the load branch.
[0050] The heat dissipation device H can include a plurality of passive heat dissipation devices H1, which can be heat sinks. The plurality of passive heat dissipation devices H1 are stacked by the first mounting member, and the load branch is mounted on the surface of the passive heat dissipation device H1, and the temperature control switch branch K is also mounted on the surface of the passive heat dissipation device H1.
[0051] The embodiment provides an exemplary layout of mounting the load branch on the heat sink, as shown in Figure 5a The top view of mounting the load branch on the heat sink, Figure 5b The cross-sectional view of mounting the load branch on the heat sink. Each heat sink of the embodiment is provided with 18 load branches, that is, Figure 5a As shown in the figure, 7 load branches are arranged longitudinally on the upper and lower edges of the heat sink, and 4 load branches are arranged transversely in the middle of the heat sink. As an implementation manner, the load can be mounted on the heat sink by screws. Since a total of 54 load branches are required in the example of the embodiment, a total of 3 heat sinks are required, and the 3 heat sinks on which the load branches are mounted are stacked by the first mounting member, so that the compactness of the structure can be ensured. The temperature control switch branch K is also mounted on the heat sink to detect the temperature of the load branch in real time. It should be noted that there are 3 heat sinks in the embodiment, and any one of the heat sinks can be selected to mount the temperature control switch branch K.
[0052] The heat dissipation device H can also include a plurality of active heat dissipation devices H2, which can be heat dissipation fans or heat dissipation fans. The active heat dissipation device H2 is connected with the power supply branch T, and the power supply branch T supplies power to the active heat dissipation device H2. In some embodiments, the number of the active heat dissipation device H2 can be 2-6, and the embodiment preferably has 2.
[0053] As shown in Figure 6The test device is shown in the figure, in some embodiments, the test device also includes a box, wherein the first light emitting device (red light), the second light emitting device (yellow light) and the third light emitting device (green light) in the signal lamp group are arranged on the outer surface of the box to facilitate the user to observe the test result; the wire harness connector is also arranged on the outer surface of the box to facilitate the connection of the signal machine to be tested; the load branch, the temperature control switch branch and the passive heat dissipation device are all accommodated in the box, the load branch and the temperature control switch branch are arranged on the surface of the passive heat dissipation device, and the passive heat dissipation device is fixed in the box through the second mounting piece. A first through hole matched with the active heat dissipation device is formed on the side of the box for arranging the active heat dissipation device, and a second through hole matched with the power supply connection interface in the power supply branch is formed on the box to arrange the power supply connection interface of the power supply branch.
[0054] Next, the working principle of the above test device is introduced.
[0055] When the test device provided by the embodiment of the present application is used to test the signal machine to be tested, first, the output end of the signal machine is connected with the wire harness connector of the test device, then the control logic of the signal lamp is sent through the signal machine to be tested, and whether the test requirements are met is observed through the signal lamp group of the test device. In the test process, the active heat dissipation device and the passive heat dissipation device of the test device dissipate the heat generated by the load branch, and when the temperature is too high due to the failure to dissipate heat in time, the signal lamp group and the load branch can be switched based on the temperature control switch branch, thereby realizing the protection of the device.
[0056] Based on the test device provided by the present application, the working condition of the signal machine under load aging operation is simulated through the load branch, the test situation is observed through the signal lamp, the heat is dissipated through the heat dissipation device, and the overheat protection is realized through the temperature control switch branch, which can not only simulate the working condition of the signal machine under load aging operation, but also ensure the test safety, so that the signal machine after the test has stable output.
[0057] Note that the above is only a preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, which all belong to the protection scope of the present application.
Claims
1. An apparatus for road traffic signal controller burn-in testing, characterized by, The traffic signal testing device comprises: a plurality of signal lamp groups, each signal lamp group comprising a red lamp branch, a yellow lamp branch and a green lamp branch; a plurality of load branches, the red lamp branch, the yellow lamp branch and the green lamp branch of each signal lamp group being connected in parallel with a corresponding load branch; a temperature control switch branch, the temperature control switch branch being connected in series in a common circuit of the plurality of signal lamp groups and the plurality of load branches.
2. The apparatus of claim 1, wherein, The red lamp branch comprises a first light emitting device and a first resistor connected in series, the first light emitting device being configured to emit red light when the red lamp branch is connected. The yellow lamp branch comprises a second light emitting device and a second resistor connected in series, the second light emitting device being configured to emit yellow light when the yellow lamp branch is connected. The green lamp branch comprises a third light emitting device and a third resistor connected in series, the third light emitting device being configured to emit green light when the green lamp branch is connected.
3. The apparatus of claim 2, wherein, Further comprising: a box, the first light emitting device, the second light emitting device and the third light emitting device being arranged on the outer surface of the box, the load branches and the temperature control switch branch being arranged inside the box.
4. The apparatus of claim 3, wherein, Further comprising: a plurality of wire harness connectors, the plurality of wire harness connectors being arranged on the outer surface of the box, the wire harness connector comprising a live wire connector and a neutral wire connector; the connection end of the live wire connector being connected to the live wire connection end of the red lamp branch, the live wire connection end of the yellow lamp branch and the live wire connection end of the green lamp branch, the connection end of the live wire connector being further connected to the live wire connection end of the road traffic signal controller to be tested; the neutral wire connection end of the red lamp branch, the neutral wire connection end of the yellow lamp branch and the neutral wire connection end of the green lamp branch being connected to one end of the temperature control switch branch; the connection end of the neutral wire connector being connected to the other end of the temperature control switch branch, the connection end of the neutral wire connector being further connected to the neutral wire connection end of the road traffic signal controller to be tested.
5. The apparatus of claim 3, wherein, Further comprising: a plurality of passive heat dissipation devices, the plurality of passive heat dissipation devices being arranged in a stack through a first mounting member, the plurality of passive heat dissipation devices being arranged inside the box through a second mounting member; the load branches being mounted on the surface of the passive heat dissipation devices; the temperature control switch branch being mounted on the surface of the passive heat dissipation devices.
6. The apparatus of claim 3, wherein, Further comprising: a plurality of active heat dissipation devices; a first through hole being formed on the side of the box and being adapted to the active heat dissipation devices, the first through hole being used for arranging the active heat dissipation devices.
7. The apparatus of claim 6, wherein, Further comprising: a power supply branch, the power supply branch being connected to the plurality of active heat dissipation devices; the power supply branch comprising a power supply connection interface, the box being provided with a second through hole adapted to the power supply connection interface, the second through hole being used for arranging the power supply connection interface.
8. The apparatus of claim 1, wherein, The load branch comprises a fourth resistor, the resistance value of the fourth resistor being in the range of 1.5kΩ-2.5kΩ.
9. The apparatus of claim 1, wherein, The temperature control switch branch comprises a temperature control resistor, the temperature control switch branch being a normally closed branch, the temperature control resistor being used for disconnecting the temperature control switch branch when the temperature exceeds a threshold value.
10. The apparatus of claim 6, wherein, The active heat dissipation device comprises a heat dissipation fan.